Quick answers
- Does Mary Catherine Fischer accept Medicare assignment?
- Yes. Medicare's clinician data says Mary Catherine Fischer accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Mary Catherine Fischer see?
- In 2024, CMS data shows 486 Original Medicare patients and 2,785 services for Mary Catherine Fischer. This counts Original Medicare only and measures volume, not quality.
- What is Mary Catherine Fischer's NPI number?
- 1306844113. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Mary Catherine Fischer, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 486 |
|---|---|
| Services billed to Medicare | 2,785 |
| Different services or procedures | 34 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Microfluid analysis of tears (83861)514 services
- Established patient complete exam of visual system (92014)222 services
- Photography of the retina (92250)215 services
- Established patient problem focused exam of visual system (92012)169 services
- Imaging of optic nerve (92133)107 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High cholesterol74%
- High blood pressure60%
- Arthritis44%
- Osteoporosis25%
- Ischemic heart disease19%
- Diabetes18%
Practice locations
Addresses where Mary Catherine Fischer is enrolled with Medicare (CMS data updated October 2, 2026).
- 2 Wisconsin Cir, Suite 500Chevy Chase, MD 20815 (301) 215‑7100
Group practices
Medicare enrollment lists Mary Catherine Fischer as a member of this group (CMS data updated October 2, 2026).
- Eye Doctors of Washington PC15 clinicians in the group
Specialties
- Ophthalmologyprimary
Other ophthalmologists in Chevy Chase
Clinicians with the same Medicare primary specialty in Chevy Chase, MD — not a recommendation.
Other clinicians in Eye Doctors of Washington PC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | George Washington University School Of Medicine |
| Graduation year | 1987 (39 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1306844113 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians